I could be wrong here (correct me if I am) but I thought the use of 'prec' is no longer recommended as it's less efficient than something like roundTo(game.score,2) because 'precision' first needs to convert the attribute it is rounding to text, perform the operation, then convert it back to a number, whereas round/roundTo performs its operation directly on the number. Ultimately it's probably not a big deal, but worth knowing if your game is doing a lot of rounding.